The group Metrology, Molecules and Fundamental Tests is performing ultra-high resolution molecular spectroscopy in the near and middle infrared and optical frequency metrology. The main experimental projects are the following:

The team Métrologie, Molécules et Tests Fondamentaux (MMT) is also building a national metrological network, in the frame of the Equipex Refimeve+, coordinated by l'Université Paris 13 and is fully involved in the Labex First-TF, national network for time and frequency metrology and its applications.